If you're utilising our native GA integration (which I believe you are), the Sidecart display is tracked as a /cart pageview, with a page title of "Sidecart". That should hopefully be enough for you to be able to filter the statistics in GA to target those people who viewed the Sidecart. I hope that helps!

It does help and it si indeed enough - I thought "/cart" was actually the full page cart and I was wondering how to track specifically the side cart, which is not really a page view in Google's terminology.